25 He answered, Look, I see four men loose, walking in the midst of the fire, and they have no hurt; and the aspect of the fourth is like a son of the gods. 26 Then Nebuchadnezzar came near to the mouth of the burning fiery furnace: he spoke and said, Shadrach, Meshach, and Abednego, you servants of the Most High God, come forth, and come here. Then Shadrach, Meshach, and Abednego came forth out of the midst of the fire. 27 The satraps, the deputies, and the governors, and the king’s counselors, being gathered together, saw these men, that the fire had no power on their bodies, nor was the hair of their head singed, neither were their pants changed, nor had the smell of fire passed on them.

28 Nebuchadnezzar spoke and said, Blessed be the God of Shadrach, Meshach, and Abednego, who has sent his angel, and delivered his servants who trusted in him, and have changed the king’s word, and have yielded their bodies, that they might not serve nor worship any god, except their own God. 29 Therefore I make a decree, that every people, nation, and language, which speak anything evil against the God of Shadrach, Meshach, and Abednego, shall be cut in pieces, and their houses shall be made a dunghill; because there is no other god who is able to deliver after this sort.

Matthew Henry's Commentary on Daniel 3:25-29

Commentary on Daniel 3:19-27

(Read Daniel 3:19-27)

Let Nebuchadnezzar heat his furnace as hot as he can, a few minutes will finish the torment of those cast into it; but hell-fire tortures, and yet does not kill. Those who worshipped the beast and his image, have no rest, no pause, no moment free from pain, Hebrews 12:29. Could we but see into the eternal world, we should behold the persecuted believer safe from the malice of his foes, while they are exposed to the wrath of God, and tormented in unquenchable fires.

Commentary on Daniel 3:28-30

(Read Daniel 3:28-30)

What God did for these his servants, would help to keep the Jews to their religion while in captivity, and to cure them of idolatry. The miracle brought deep convictions on Nebuchadnezzar. But no abiding change then took place in his conduct. He who preserved these pious Jews in the fiery furnace, is able to uphold us in the hour of temptation, and to keep us from falling into sin.